Reactions of 3-methylamino-5-phenylthiophene with α,β-unsaturated esters and α,β-unsaturated nitriles
作者:Jong Seok Lee、Kyongtae Kim
DOI:10.1002/jhet.5570370222
日期:2000.3
ene with α,β-unsaturated esters, i.e., methyl acrylate, (E)-methyl crotonate, diethyl fumarate, diethyl maleate and ethyl propiolate, in tetrahydrofuran for several days at reflux gave 1-methyl-3,4-dihydrothieno[2,3-e]pyridin-2-ones 4 and/or 1-methylthieno[2,3-e]pyridin-2-ones 5, depending on the structure of the esters. On the other hand, the same reactions with α,β-unsaturated nitriles such as acrylonitrile
在四氢呋喃中,用α,β-不饱和酯,即丙烯酸甲酯,(E)-巴豆酸甲酯,富马酸二乙酯,马来酸二乙酯和丙酸乙酯处理3-甲基氨基-5-苯基噻吩,回流几天,得到1-甲基- 3,4-二氢噻吩并[2,3- e ]吡啶-2-酮4和/或1-甲基噻吩并[2,3 - e ]吡啶-2-酮5,取决于酯的结构。另一方面,与α,β-不饱和腈(如丙烯腈和四氰基乙烯)的相同反应,得到相应的噻吩7和10在C-2上分别带有2-氰基乙基和1,2,2-三氰基乙烯基。在相同条件下与(Z)-1,2-二氰基乙烯的反应产生相应的带有1,2-二氰基乙烯基和1,2-二氰基-5-甲基氨基联苯的噻吩9。